Dump means for power operated shovels



VPatented Nov. 3,k

' A -leuv'ronicv CALABRESE, or snATfrLnWAsHINeToN A napnctinnjlea July 3,

Myinventionrelates to improvements xin automatic means for dumping the dippers object'of'my invention is to provide'mechapnism 'of thisnature in which 'the durnpmeans Y' control'is placed withinor onthe grip`por- Y f said-,dump means controlmay be operated without"necessitatingthe removal of the op- 10 erators hand from the lever. v f

Another object is to provide dump mech-ae.' nism `ot this nature which is 'controlled electromagnetically. y y v n A further object is to provide dump means 15 `of this naturel embodying@ friction clutch mechanism lof improvedlconstruction. Other objects are to provide dump means of this nature which aieisimple and elioient' 'in-constructiom which will "save time and o labor on the part'fof thefoperatorandwhich will vmake rit possible to *do'Vinorejworkl with a fpower operated shovel Vfand 'fto discharge v v"fbodyinga turntable 5, mountedon'cat'erpiljthe .load'more' ace'u'rately fandeiiicientl'y. ral, Other and more specific lobj ects .will be ap: i? parent from the followingdeseription taken in connection' withk the' accompanying I d ,raw-` 'j ings.,

Power 'operated shovels*y ofi type now in y 'common use are-manipulate'dby oneman and Qusually'havethree operating levers for con-l Vtrolling the nmvementfjof thedipper', which K 'levers` require substantially constant atten- Vjtion during-theoperation ofthe shovel. In g addition to'this itis -common, practice to pro'-l vide an additional, or fourth leverwhich controls thedumping and requires v thel Vremoval of one hand fronithey three Yoperating levers f-forv dumping the dipper," The removaly of one hand from the operating? levers' consumes time', `slows up the'r'operation' of the shovel, tires the operator and often makes its .dilii' cult to dump the moving bucket` at the exactl fqlocationdesi-red* In accordance with my invention I provideipower "operatedl means for dumpingfthe 'bucket and place the control Vmember' of said power operated'means within,

or onf/the`r gripmember offonefof the vopeiat! .ingu levers so .that said; control member. may

lever, or in any Y v operation of the lever. of power operated shovels and thejgeneral i929'.k serial No. 375,685. f

,way interfering with the n 4is a. somewhat diagrammatic .viewof ya power f `operated shovel having my control means ins 55 I p stalled thereon for dumping .the dipper. jtion of oneof ythe operating levers whereby f Figf 2 isv a detached, fragmentary sectional view showingthe grip'end'of a lever in Akand partly in elevation of la windingjdrumy and electromagnetically operated clutch em- Ybodied in the invention.

-Fi'g. ril! isfan` elevation" substantially on broken line 4 4 of Fig. 3.

. p v 65 Fig.`5 is anelevation showingr a 'fragment Of-an' alternative form lofmechanism for Op- @rating the clutch; l

j .Like vreference numerals designate like .partsY throughout the several views'. ,Y i l0 Referring to Figyl, I show, somewhat dia-v gramniatieallv'a power operated shovelem- `lar jtreadsfi, and supporting ahousing 7,.`

withiny which is ldisposed the usual winding/55 y drums 8', operated by an' internal combustion VVYThree'operatinglevers 11, 12, and ,13'v are mounted toward the forward end of the turntable 5. v These levers are the control levers-S0 'for a dipper 14',`which is mounted on the outer end yof a dipper arm l5 that is supjresults in a loss of time.; `It is the object of my present invention to dispense with this fourth dumping lever 17 and provide a" more quickly' operated means ltorclumping the y dipper. j V93 In accordancev with my invention I provide within the grip 3 portion of one of the clipper control levers, .as thelever 11' which Controls the `sidewise swinging movementk of vthe clipper, an ,electric switch,l preferably` in W y th'erform of a pushV button member 2O disposed within a. housing 2l of insulating mate! ria-l and arranged to be depressed, as bythe f .thumb of: the left hand with which the opferator graspstlie lever 11,*to make contact between two terminals 22 vand23. vThe lpush l button member "20. may be urged .into .the open switch position by aspring l24.l Clrcuit wires 25 connect the switch terminals 22 and '23 with thef'sourcef'of supply of electriccur-r rent Vof the internal-combustion motor-9 and. Vwith electromagnets as hereinafter described.V I Ause the previously described switch to control an electromagnetically governed i. clutch through which power from the motor #is taken .off Vfor .dumping the dipper. This "clutch, see Fig. 3v7 comprises'an inner .clutch disc 26" which .isf-secured las byabolt 2"?V to vfthe main driven shaftt28 of the machineand Vzofis provided with a centrally arrangednoutwardlfy projecting spindle l 29.. Another v y.clutth disc 30 is splined .onthe spindle 29 asV by akey 31,.and .a winding drumfdifsc .32 `is y Y. "loosely 4androtatably mounted onthe spindle K 25.29`between. the .two clutch .discs26 and 30. Y y VSuitable friction plates 33are provided bef tweenvthe"respective :clutch discs 2.6 Vand 30'V and the winding drum. disc-32", A winding f V{druin 34 is Vformedon theperiphery of the eo disc 32 for the reception offa cable 3.5. .which extends'. forwardly `andis connected with a dump Vleverxf? on -the Adipper 14.y The latchvr mechanism which holdsthe bottein of ythe dipper .closed isl .arranged to be yreleased by exertingapull on the 'cable35fj This latch is of well .knownconstruction and Vis not speciically illustrated andv d`escribed'.V

r For 'the lpurpose of engaging lranged to bear againstthe hub of theclutch disc 30, .to cause the discs 3Oand26 to bind 'Q frifctionally on-thedrum disc 32. Theouter end of the leveri36 has., an armature bar`40 secured thereto; and lsuitable'yelectrornagnets n u4l, preferably two. in .nnrnberare provided Y forexerting a pull on the armatureV bar 40 i `:to move the :outer end of theflever-36out i j; vagainst thehnb of the disc 30 and apply the" wardly andcause thecam portion 38 to press clutch. Theelectromagnets 4l are supportedA by abracket y43 which" is adjustablv secured ,to the spindle 29 by'y nutsf44; Move- I ment lof ftheeleetrolnagnets toward or raway from the armature bar 40fadj'usts the width the lever 36 to released position is conneeted betweentheltcqiend of saidleverand tlieidisc Y l30 and Van adinstblev set screw :having a .v the releasing'nioveinent :cf the lever A. y y y Vthe-clntchso V'as'. 't6'rotate vthe vdrum 34 I lprovifde. aflever izwhihis connected'by pivotmeans withv Y.the .spindlel29 'and' has camportions 38 .arl.

brushes 49 .and circuit `wires 25. .with lthe sourcefrom which electrical current is supplied to the engine. The circuit vwires 25 includeV the control switch'20, 227,23as indr cated diagrammatically inFig. 3.

The clutch and electromagnets are preferably enclosed within'a shield 'or housing 50'.

In the operation `of this device the clutch discs 26`and l3() together'with all parts connected vtherewith except thewinding drum disc 32 will be rotated with the driven-shaft 28.4 When'the switch. 20,- 22, 23-,fis closed theelectrornagnets 41 will he energized and theouter.endl of theflever 36 will be moved outwardly thus causing` the'cam portions 38 .to pressgthe clutch v,disc130 against` the drum Ydis c..32',fand rotatey the drum 34. vThis ,exerts a pull on the tri-p cable 3'5 and trips the dipper. AsV soon as the switch is released i it .auto-inaticallyopens vand the electromagnets 4l release the `bar 40 andthe spring 42 pulls the lever 36 inwardly thus releasing/the .grip of the clutch. The set screw 45 in the lever 36 is'preferably adjusted so that 'the clutch will never'be:entirelyfreleasedbuft will always exerta slight drag on .the drinn diss* 321jnstsullicientr totakefup thek slack? in the trip line for i all positions iof thedipper butfznotfenoughf to trip saiddipper. .This

dragof the' clutch' will automatically take np or-Jadjustythe Vlengthof'the Vtrip line 35 when vthe looon'af16.` Yis raised or lowered thus v inakingivotherl adjustments for this" purpose 'unnecess'ary'f.-4 .Y In Fig." l5I show talternativeclutch op? erating means. in which the spindle 29de externally threaded asflfarxinwardly as the Vclutch disc 30,.'andiniyvhichE an adjustable collarjl is screwed ontosaid spindle and locked vin any desired Vadiusted position n. by a 'lock nutV 52.y A forked lever `36"is Vmeunted on fpivots'" onl the coll-ar 51 -andhas dat front sides arranged'to rest against thehnb of the dise30 whentheclutch is in the Vreleased or drag. position. AOutward' movement,` of the top `end ofthe lever 36V sets the clutch as hereinbefore described;` In this construction the sp'rin 42` and'sei screw .45 are bothv dispensed with and the dragtof the clutch mayV Y Y l be adjusted by adjusting? collar Y 51'. i of the gap therebetween and also varies the Y amountof movementof the lever 36V. '.A'ten Vsion springj42- of sucientstrength to return g Where shovels are operated yelectrically the `shovel isA steam operatedV then batteries 'or agenerator maybe provided. 'Vlherejcoinn pressed air-butno electric'eurrent isavailable thefelectric switch '-inthe; lever Yhandle ina'yfb'e replaced by an a rlvalveand the j clutclioperatedihy compr'esseri air;

results in a great saving of time and an ina shovel'and crew to Inove'more material.

Lasa-224 o 3 The placing of the dumping control in the end of the` lever handle and under the thumb Y of the operatorsihand which grasps the lever crease vin eliciency and makesk it possible for The foregoing description and` accompanying drawings clearly disclose'apreferred embodiment of my invention but it willbe :un-y derstood that this disclosure is merely illustrative and that changes in the device may be made within the scope and spirit of the following claims. y

I claim: f 1. Apparatus of the class described-embody/ingr a maindriven shaft, rfriction clutch mechanism secured to said mainr driven shaft' and rotatable therewith,fa winding drum arranged tobe driven by said clutch mechanism, a trip cable on saidy drum, electrom'ag- A net Vmeans rotatable with said clutch mechanism for applying said clutch mechanism to said' drum anda switch controlling the circuit to :said electromagnetmeansl. K 1 Y 2. The combinationwith apo'wer vshovel Y having 'a main driven shaftfl of*` a friction c clutch disc secured to said drivenffshaft and rotatable therewith,v a spindle extending outwardly fromthecenter ofl said disc, another frictionl clutch disc splined onsaid spindle, Y a winding-drum having a disc portion *dis-i posedbetween said two friction clntchdiscsl androtatable on said spindle,` a camfflever fulcrumed ,onssaid spindle 'and arranged to ipply said friction clutchdiscs to said windingfdrum disc, electromagnet means adjustiblysupported from said spindle androtaty lable therewith for operating said camlever, 1nd ,.aj, switch for 'controlling thevcircuit to aid electrom'agnet means. y j

3.` The apparatus as claimed in claim 2 inV which slip rings are 'provided on one of said'` :lutch members and circuit wires extend'from ki xaid slip rings through said' spindle-and are,Y :onnected with said electromagnetmeans. v

4. The apparatus as claimed in claim 2 in vhich a longitudinally adjustable collar is )rovided on the spindle' and the cam lever is ulcrumed on said collar; Y n

Y The foregoing Vspecification signed at Seattle, Washington, this 28thv day of June,

929. e 1 Y Y ANTONIOUCALABRESE. 

